Stars take millions of years to form and they come in many types and sizes. Many factors must be taken into consideration regarding the birth of stars. This paper will detail the life cycle of stars.
Objects in the Universe remit, reflect and absorb electromagnetic waves in their own unique way. Light or electromagnetic radiation is considered a form of energy. "Visible light is a narrow range of wavelengths of the electromagnetic spectrum." (Anonymous, 1994). In order to learn about the nature of objects, "measurements of the wavelength or frequency of light from these objects" (Anonymous, 1994) should be studied. To transmit information from space, electromagnetic radiation is needed. The human eye is can only see small ranges of wavelengths. Our eyes cannot see most objects in the universe. "Astronomers use telescopes with detection devices that are sensitive to wavelengths other than visible light in order to study objects that emit this radiation" (Anonymous, 1994).
"The universe is the sum total of all matter and energy, encompassing the super clusters and voids and everything within them" (Bennett, Donahue, Schneider, and Voit, 2004). The hierarchy of the universe is as follows planets move around stars. Stars are grouped together and move slowing around the center of the galaxy. Galaxy clusters are formed by galaxies which are held by gravity as they move through the void. Super clusters contain thousands of galaxies. "The super clusters are arranged in filament or sheet-like structures between which there are gigantic voids of seemingly empty space" (Bennett, Donahue, Schneider, and Voit, 2004). The Milky Way is one of the two largest galaxies among about 40 galaxies in the Local Group.
Stars are composed of hydrogen and helium. This cloud is referred to as a nebula. The nuclear fuel of these stars is burned quickly which causes the core to be composed of iron. During the nuclear fusion process, iron cannot be burned as it... [continues]
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